How do you count the number of elements in a list using Python?

In Python, you can use the len() function to count the number of elements in a list. For example:

my_list = [1, 2, 3, 4, 5]
print(len(my_list))  # 输出：5

Additionally, you can also use a loop to count the number of elements in a list. For example:

my_list = [1, 2, 3, 4, 5]
count = 0
for _ in my_list:
    count += 1
print(count)  # 输出：5

Both of these methods can be used to count the number of elements in a list, but using the len() function is more concise and efficient.